[turbofan] add register assignment verifier

src/compiler/instruction.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_INSTRUCTION_H_
 #define V8_COMPILER_INSTRUCTION_H_
 
 #include <deque>
 #include <iosfwd>
 #include <map>
@@ skipping 314 matching lines @@
     DCHECK(index >= 0);
     if (index < kNumCachedOperands) return &cache[index];
     return new (zone) SubKindOperand(index);
   }
 
   static SubKindOperand* cast(InstructionOperand* op) {
     DCHECK(op->kind() == kOperandKind);
     return reinterpret_cast<SubKindOperand*>(op);
   }
 
+  static const SubKindOperand* cast(const InstructionOperand* op) {
+    DCHECK(op->kind() == kOperandKind);
+    return reinterpret_cast<const SubKindOperand*>(op);
+  }
+
   static void SetUpCache();
   static void TearDownCache();
 
  private:
   static SubKindOperand* cache;
 
   SubKindOperand() : InstructionOperand() {}
   explicit SubKindOperand(int index)
       : InstructionOperand(kOperandKind, index) {}
 };
@@ skipping 229 matching lines @@
     LAST_INNER_POSITION = AFTER
   };
 
   ParallelMove* GetOrCreateParallelMove(InnerPosition pos, Zone* zone) {
     if (parallel_moves_[pos] == NULL) {
       parallel_moves_[pos] = new (zone) ParallelMove(zone);
     }
     return parallel_moves_[pos];
   }
 
-  ParallelMove* GetParallelMove(InnerPosition pos) {
+  ParallelMove* GetParallelMove(InnerPosition pos) const {
     return parallel_moves_[pos];
   }
 
   static GapInstruction* New(Zone* zone) {
     void* buffer = zone->New(sizeof(GapInstruction));
     return new (buffer) GapInstruction(kGapInstruction);
   }
 
   static GapInstruction* cast(Instruction* instr) {
     DCHECK(instr->IsGapMoves());
@@ skipping 315 matching lines @@
   void MarkAsReference(int virtual_register);
   void MarkAsDouble(int virtual_register);
 
   void AddGapMove(int index, InstructionOperand* from, InstructionOperand* to);
 
   BlockStartInstruction* GetBlockStart(BasicBlock::RpoNumber rpo);
 
   typedef InstructionDeque::const_iterator const_iterator;
   const_iterator begin() const { return instructions_.begin(); }
   const_iterator end() const { return instructions_.end(); }
+  const InstructionDeque& instructions() const { return instructions_; }
 
   GapInstruction* GapAt(int index) const {
     return GapInstruction::cast(InstructionAt(index));
   }
   bool IsGapAt(int index) const { return InstructionAt(index)->IsGapMoves(); }
   Instruction* InstructionAt(int index) const {
     DCHECK(index >= 0);
     DCHECK(index < static_cast<int>(instructions_.size()));
     return instructions_[index];
   }
@@ skipping 75 matching lines @@
 
 
 std::ostream& operator<<(std::ostream& os,
                          const PrintableInstructionSequence& code);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_INSTRUCTION_H_